// These are meant to be typed into the REPL. You can also run
// scala -Xnojline < repl-session.scala to run them all at once.

import java.awt.{Color, Font}

Color.RED
Font.BOLD

/**
 * HashMap 重命名为 JavaHashMap
 */
import java.util.{HashMap => JavaHashMap}

/**
 * scala.collection.mutable._ 等于Java中的 scala.collection.mutable.*
 */
import scala.collection.mutable._

new JavaHashMap[String, Int]
new HashMap[String, Int]

/**
 * HashSet => _, _ 隐藏掉该对象
 */
import java.util.{HashSet => _, _}
import scala.collection.mutable._

new HashSet[String]
